EP3915189A1 - Elektromechanischer linearantrieb - Google Patents
Elektromechanischer linearantriebInfo
- Publication number
- EP3915189A1 EP3915189A1 EP20702436.5A EP20702436A EP3915189A1 EP 3915189 A1 EP3915189 A1 EP 3915189A1 EP 20702436 A EP20702436 A EP 20702436A EP 3915189 A1 EP3915189 A1 EP 3915189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmission element
- electromechanical
- housing
- drive unit
- linear drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 103
- 239000000463 material Substances 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims 1
- 239000000543 intermediate Substances 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000004323 axial length Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/021—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using intermittent driving, e.g. step motors, piezoleg motors
- H02N2/025—Inertial sliding motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
Definitions
- the present invention relates to an electromechanical linear drive, in particular for the precise positioning of an element to be driven.
- the present invention relates to a linear drive which has an electromechanical drive unit, a transmission element coupled to it, and a drive element to be driven, which unit can be moved along the transmission element by deformation movements of the electromechanical drive unit due to an adhesive sliding effect.
- DE 10 2005 026 708 B4 discloses a positioner in which a structural unit can be displaced via an adhesive slide drive along a translation axis accommodated in a housing and actuated by an actuator.
- the translation axis is completely accommodated in the housing and is coupled to the housing via solid-state joints in order to secure the translation axis or the actuator against rotation and lateral displacement.
- the use of solid-state joints, which must be firmly bonded to the end faces of the translation axis via adhesive, has a disadvantageous effect here on production costs and assembly costs.
- JP H 08149860 discloses a similar drive, the housing of which has a recess in which a carrier axis of an element to be driven is arranged, and a further recess in which an electromechanical drive unit is arranged. Accordingly, the housing has a length that makes it possible to fully accommodate the longitudinal axis of the carrier axis and the electromechanical drive unit.
- the restricted accessibility to the element to be driven is also disadvantageous in this configuration due to the surrounding housing. In particular, it is disadvantageous that the travel of the element to be driven is also limited due to the surrounding of the housing.
- an electromechanical linear drive in a simplified and compact configuration, which is consequently characterized by low production costs and low assembly costs and unrestricted accessibility to the element to be driven and enables an extended travel of the element to be driven.
- the present object is achieved by an electromechanical linear drive according to claim 1.
- This comprises a housing, an electromechanical drive unit, a transmission element coupled to the electromechanical drive unit, an element to be driven which is in frictional contact with the transmission element, the transmission element being opposite at at least two bearing points the housing is mounted and the element to be driven is at an engagement point outside of all bearings with the transmission element in frictional contact.
- the point at which the element to be driven is in engagement with the transmission element is outside the bearing points, a simple and compact configuration of the linear drive can be guaranteed with unrestricted access to the element to be driven. Furthermore, the travel of the element to be driven is not limited to the distance between the bearing points.
- the invention provides that a first section of the transmission element, which is located between the bearing points, runs inside the housing and / or a second section of the transmission element, which is located outside of all bearing points, protrudes from the housing.
- a first section of the transmission element which is located between the bearing points, runs inside the housing and / or a second section of the transmission element, which is located outside of all bearing points, protrudes from the housing.
- the electromechanical drive unit preferably non-positively, is arranged in the housing and forms one of the bearing points of the transmission element. A functional combination with regard to driving and mounting the transmission element is thus achieved in the electromechanical drive unit.
- the electromechanical linear drive comprises a guide element which forms one of the bearing points of the transmission element, wherein the guide element preferably supports the transmission element in an axially displaceable manner, the guide element preferably being designed as a bushing through which the transmission element projects.
- the guide element has a part that is inside the housing and a part that is outside the housing. This division allows the respective parts of the guide element to be individually matched to their special function. While the part that is in the housing is a good connection to the housing must allow, the part that is located outside of the Ge, in particular to be coordinated with the guide of the transmission element.
- the electromechanical linear drive comprises a pretensioning device that is configured to pretension the electromechanical drive unit against the housing, preferably against an inner surface of the housing, wherein the pretensioning device can preferably be screwed into the housing, and particularly preferably a diaphragm spring includes.
- a high biasing force can be optimally applied to the electro-mechanical drive unit, whereby the working range of the drive unit can be adjusted.
- the electromechanical linear drive comprises an intermediate element which is fixedly connected to the transmission element and which is arranged at least in sections between the transmission element and the electromechanical drive unit, preferably in such a way that the pretensioning force of the pretensioning device can be applied to the electromechanical drive unit via the intermediate element is. Since the intermediate element takes on the function of an adapter, transmission elements with different diameters or cross-sectional shapes can be coupled to the same drive unit.
- the electromechanical drive unit is made of a piezoelectric or an electrostrictive or a magnetostrictive material.
- the electromechanical drive unit has an annular shape or a hollow cylindrical shape and / or the transmission element is rod-shaped, preferably with a circular cross section, the intermediate element preferably being arranged concentrically with the electromechanical drive unit.
- the intermediate element is integrally connected to the transmission element and / or to the electromechanical drive unit.
- a loss-free connection of the transmission element to the electromechanical drive unit can be made possible by adhesive bonding.
- a radial mounting of the transmission element is realized by the adhesive connection.
- the transmission element is formed from a harder material than the guide element, the transmission element preferably being made of ceramic and the guide element preferably having a plastic and / or preferably consists of a plastic, the plastic having slip-improving and / or wear-reducing additives.
- the transmission element protrudes with an interference fit through the guide element.
- play-free guidance of the transmission element can be made possible.
- first section of the transmission element is shorter than the second section of the transmission element. As a result, a long travel of the element to be driven can be provided in a compact housing.
- the electromechanical drive unit can be excited to undergo deformation movements by the application of electrical voltages, the transmission element following the deformation movements of the electromechanical drive unit, and the resulting movements of the transmission element being transferable to the element to be driven, so that the element to be driven is defined Thrust force is movable along the axial direction of the transmission element.
- the pretensioning force applied by the pretensioning device to the electromechanical drive unit is at least ten times the thrust force acting on the element to be driven.
- the stick-slip effect denotes the sticking back of moving solid bodies and is known from the prior art.
- the adjustment of the element to be driven along the transmission element by means of an adhesive sliding effect comprises an adhesive phase in which the element to be driven engages with the transmission element by means of static friction, and a sliding phase in which the element to be driven moves relative to the transmission element.
- thrust describes the usable force of the electromechanical drive unit that can be exerted on an element to be driven.
- blocking force denotes the pretensioning force acting on the electromechanical drive unit, in which the drive unit when the maximum possible electrical force is applied Voltage has no deformation compared to the mechanically and electrically unloaded state.
- Figure 1 is a schematic representation of the linear drive according to the invention.
- Figure 2 is a cross-sectional view of an embodiment of the linear drive according to the invention.
- FIG. 3 shows a perspective view of the linear drive according to FIG. 1.
- FIG. 4 shows a cross-sectional view of a further embodiment of the linear drive according to the invention.
- Figure 1 illustrates the principle of the linear drive according to the invention in a schematic representation.
- An element 8 to be driven is engaged at a point E (engagement point) with the transmission element 4 via frictional contact.
- the point of engagement E lies outside the bearing points L1 and L2.
- the electromechanical linear drive 1 contains the housing 2, which has a through bore with a jump in diameter.
- An annular electromechanical drive unit 3 is arranged in the housing 2 in such a way that an end face of the electromechanical drive unit 3 is supported against an inner surface of the housing 2, which is provided due to the change in diameter of the housing bore.
- the end face of the electromechanical drive unit 3 is glued to the inner surface of the housing 2.
- the transmission element 4, which is preferably rod-shaped and has a circular cross section, is coupled to the electromechanical drive unit 3.
- the transmission element 4 has one such an extension in the axial direction that a section A1 of the transmission element 4 extends within the housing 2 and another, preferably larger, section A2 of the transmission element 4 protrudes from the housing 2 (see FIG. 1).
- a hollow cylindrical intermediate element 5 is inserted into the opening of the ring-shaped electromechanical drive unit 3, a collar of the intermediate element 5 being supported on the other end face of the electromechanical drive element 3.
- the intermediate element 5 is glued to the electromechanical drive unit.
- the transmission element 4 is arranged so that it protrudes through the opening of the inter mediate element 5 and in a preferred embodiment is glued to the intermediate element 5. So that the transmission element 4 is firmly connected to the electromechanical drive unit 3.
- Electromechanical drive units are usually preloaded for correct operation.
- the operating range of the electromechanical drive unit 3 is set in a targeted manner by the bias. In particular, this allows the balance of the deformation movements of the electromechanical drive unit 3 to be set.
- a biasing device 6 is provided in the through hole at one end of the housing 2, which is essentially embodied by a screw.
- the corresponding section of the through hole is provided with a thread, can be screwed into the biasing device 6.
- a high pretensioning force can be optimally applied to the electromechanical drive unit 3 via the collar on the intermediate element 5 by the pretensioning device 6.
- the biasing force is approximately 1/3 of the blocking force of the electromechanical drive unit 3.
- the biasing device 6 comprises a diaphragm spring which is arranged between the screw and the collar of the intermediate element 5.
- the diaphragm spring is a pure compression spring, which is provided exclusively for the axial preload of the electro-mechanical drive unit 3 and does not contribute to the mounting of the transmission element 4.
- a guide element 7 in the form of a cylindrical bush is inserted into the through hole.
- the guide element 7 comprises a part that is located inside the housing 2 and a part that is located outside the housing 2.
- the guide element 7 is preferably glued into the housing 2 and / or pressed or screwed in.
- the transmission element 4 protrudes through the guide element 7. In this case, at least in sections, preferably at the end section of the guide element 7 at which the transmission element 4 protrudes from the housing 2, there is no play Guidance of the transmission element 4 is provided by the guide element 7.
- the transmission element 4 consists of a harder material than the guide element 7.
- the transmission element 4 preferably consists of a ceramic material and the guide element 7 consists of a plastic or has at least one plastic.
- the plastic can have slip-improving and / or wear-reducing additives.
- the outer diameter of the transmission element 4 has an oversize compared to the inner diameter of the guide element 7, as a result of which a corresponding press fit prevails between the transmission element 4 and the guide element 7.
- the transmission element 4 and the guide element 7 are preferably matched to one another in such a way that the interference fit prevails in the end section of the guide element 7 at which the transmission element 4 protrudes from the guide element 7.
- This Endab section of the guide element 7 is located in the part of the guide element 7 which lies outside half of the housing 2.
- the bearing point L1 lies outside the housing 2. Due to the choice of materials and diameter described, the transmission element 4 independently works a play-free guide made of the material of the guide element 7.
- the frictional force between the guide element 7 and the transmission element 4, i. H. the axial force which has to be used to push the transmission element 4 through the guide element 4 is in the range: 0.1 thrust force ⁇ friction force ⁇ thrust force.
- the part of the guide element 7 which lies within the housing 2 is only conditionally suitable for forming a defined fit, since, for example, in the case of a pressed-in guide element 7, forces from the housing 2 on this part of the guide element 7 are known.
- the guidance of the transmission element 4 by the end section of the guide element 7 described above results in a large distance between the bearing points L1 and L2, the forces acting on the bearing points L1 and L2 being able to be kept small due to the corresponding lever.
- the stood between the bearing points L1 and L2 approximately twice the axial length of the electromechanical drive unit 3.
- the electromechanical drive unit 3 By applying electrical voltages, the electromechanical drive unit 3 can be excited to translational deformation movements that are transmitted to the coupled transmission element 4.
- the element 8 to be driven which is in frictional contact at the point of engagement E on the second section A2 of the transmission element 4, which projects out of the housing 2, is along with a defined thrust force by the translational movements of the transmission element 4 and the above-described adhesive sliding effect the axial direction of the transmission element 4 shifted.
- the element 8 to be driven By targeted electrical control of the electromechanical drive unit 3, the element 8 to be driven can be positioned exactly along the transmission element 4.
- the pretensioning force applied by the pretensioning device 6 to the electromechanical drive unit 3 is typically twenty times, but at least ten times, the thrust force acting on the element 8 to be driven.
- FIG. 4 shows a further embodiment of the linear drive.
- the difference from the first embodiment essentially consists in the fact that the guide element 7 is integrated in the prestressing device 6 and the transmission element 4 projects through the prestressing device 6. In this way, the electromechanical linear drive can be made even more compact.
- the distance between the bearing points L1 and L2 approximately corresponds to the axial length of the electromechanical drive unit 3.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019200943.3A DE102019200943B4 (de) | 2019-01-25 | 2019-01-25 | Elektromechanischer Linearantrieb |
PCT/EP2020/051856 WO2020152365A1 (de) | 2019-01-25 | 2020-01-27 | Elektromechanischer linearantrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3915189A1 true EP3915189A1 (de) | 2021-12-01 |
EP3915189B1 EP3915189B1 (de) | 2024-09-11 |
Family
ID=69374286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20702436.5A Active EP3915189B1 (de) | 2019-01-25 | 2020-01-27 | Elektromechanischer linearantrieb |
Country Status (6)
Country | Link |
---|---|
US (1) | US11716035B2 (de) |
EP (1) | EP3915189B1 (de) |
JP (1) | JP7373574B2 (de) |
CN (1) | CN113330681A (de) |
DE (1) | DE102019200943B4 (de) |
WO (1) | WO2020152365A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113346790B (zh) * | 2021-05-31 | 2023-08-18 | 苏州大学 | 压电线性微型驱动器 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3141714B2 (ja) * | 1994-11-21 | 2001-03-05 | ミノルタ株式会社 | 電気機械変換素子を使用した駆動装置 |
JP2000035083A (ja) | 1998-07-16 | 2000-02-02 | Tokai Rubber Ind Ltd | 能動的防振用加振器 |
JP2000077737A (ja) | 1998-08-26 | 2000-03-14 | Minolta Co Ltd | 圧電変換素子及びその製造方法並びに圧電変換素子を使用したアクチエ−タ |
JP4144171B2 (ja) * | 2000-09-14 | 2008-09-03 | コニカミノルタホールディングス株式会社 | 電気−機械変換素子を用いた駆動装置 |
JP4742519B2 (ja) * | 2004-05-14 | 2011-08-10 | コニカミノルタオプト株式会社 | 電気機械変換素子を用いた駆動装置 |
JP2006262580A (ja) | 2005-03-16 | 2006-09-28 | Sony Corp | 光学的な制御用部材の駆動装置及び撮像装置 |
JP4931183B2 (ja) * | 2005-03-31 | 2012-05-16 | 富士フイルム株式会社 | 駆動装置 |
DE102005026708B4 (de) * | 2005-06-09 | 2007-05-03 | Attocube Systems Ag | Positionierer mit Festkörpergelenk |
JP2007049874A (ja) * | 2005-08-12 | 2007-02-22 | Fujinon Corp | アクチュエータ |
KR20070042772A (ko) * | 2005-10-19 | 2007-04-24 | 엘지전자 주식회사 | 초소형 압전 리니어 모터 |
KR20080093880A (ko) | 2007-04-17 | 2008-10-22 | 미쓰미덴기가부시기가이샤 | 구동 장치 |
JP2009071990A (ja) | 2007-09-13 | 2009-04-02 | Canon Electronics Inc | 駆動装置 |
CN101498829B (zh) * | 2008-01-30 | 2010-08-25 | 德昌电机(深圳)有限公司 | 镜头驱动装置 |
JP5376115B2 (ja) | 2008-08-27 | 2013-12-25 | ミツミ電機株式会社 | 駆動装置の駆動方法 |
DE102008053646A1 (de) * | 2008-10-29 | 2010-05-06 | Minebea Co., Ltd. | Linearantrieb mit Schockkompensation |
JP4574731B2 (ja) | 2009-12-11 | 2010-11-04 | キヤノン株式会社 | 振動波駆動装置 |
KR101048047B1 (ko) * | 2010-02-01 | 2011-07-13 | 오건희 | 압전 리니어 모터 |
JP5767120B2 (ja) | 2010-02-04 | 2015-08-19 | 森田 剛 | 駆動装置 |
CN103339848B (zh) * | 2011-02-07 | 2016-01-20 | 株式会社村田制作所 | 位移构件、驱动构件、促动器及驱动装置 |
EP2590315A1 (de) * | 2011-11-02 | 2013-05-08 | Physik Instrumente (PI) GmbH & Co. KG | Antriebsvorrichtung |
JP2014119646A (ja) * | 2012-12-18 | 2014-06-30 | Konica Minolta Inc | 駆動装置および撮像装置 |
JP6406593B2 (ja) * | 2013-12-28 | 2018-10-17 | 株式会社ミクロブ | 駆動機構 |
DE102014205280B3 (de) * | 2014-03-21 | 2015-06-11 | Physik Instrumente (Pi) Gmbh & Co. Kg | Trägheitsantrieb |
-
2019
- 2019-01-25 DE DE102019200943.3A patent/DE102019200943B4/de active Active
-
2020
- 2020-01-27 CN CN202080010743.0A patent/CN113330681A/zh active Pending
- 2020-01-27 EP EP20702436.5A patent/EP3915189B1/de active Active
- 2020-01-27 JP JP2021542542A patent/JP7373574B2/ja active Active
- 2020-01-27 WO PCT/EP2020/051856 patent/WO2020152365A1/de unknown
- 2020-01-27 US US17/425,518 patent/US11716035B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3915189B1 (de) | 2024-09-11 |
WO2020152365A1 (de) | 2020-07-30 |
DE102019200943A1 (de) | 2020-07-30 |
JP2022518058A (ja) | 2022-03-11 |
US11716035B2 (en) | 2023-08-01 |
US20220029559A1 (en) | 2022-01-27 |
JP7373574B2 (ja) | 2023-11-02 |
DE102019200943B4 (de) | 2020-10-08 |
CN113330681A (zh) | 2021-08-31 |
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